William kent



(No Model.)

W. KENT. 8

METHOD 0E MAKING READERS FOR WATER TUBE BOILERS.

888811888 Aug. 18, 1888.

Emi 5@ l i M @wy /Z @Q W C zyg ZHIIIIIIIIIVAHIIIIIIIIE e/ V/AIIIIIIIWWIIIIIII@ e Unirse @rares Partnr @tricem VILLIAM KENT, OF JERSEY CITY, NEV JERSEY.

METHOD OF MAKING HEADERS FOR WATER-TUBE BOILElRS.

SPECIFICATION forming part of Letters Patent No. 324,706, dated August 18, 1885.

l Application filed October 24, 1884. (No model.)

and I do hereby declare the following to be a` full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to certain new and -useful improvements in the process of manufacturing headers for watertube boilers, and has for its object to simplify and ehcapen the same; and with these ends in view my invention consists in the method hereinafter in detail explained, and then specifically designated by the claims.

In order that those skilled in the art to which my invention appertains may fully understand its operation, I will proceed to describe the same in detail, referring by letter to the accompanyingdrawings, forming a part of this specification.

Figure 'I is a front view of a completed header; Fig. 2, a central vertical section of the same, which is formed from a wroughtiron or steel tube, as hereinafter explained; Fig. 3, a side elevation showing a tube with the mandrels inserted; Fig. 4L, an end view of the same; Fig. 5, au end view showing the shape of the tube and the position of the man,-

drels after the latter have been spread to their limit; Fig. G, a plan view showing the rectangular tube in position between the male cnttingdies, the female dies being shown inside the tube by dotted lines; Fig. 7, a crosssection taken through one of the female dies; Fig. 8, a similar view showing a modified form of dies made in two parts; Fig. 9, a central longitudinal section showing the handhole dies operating upon the rectangular tube to form the seats, and Fig. 10 a cross-section of the tube taken through one of the com pleted hand-holes.

Similar letters denote like eral figures of the drawings.

I first take a tube, A, of the desired length parts in the Sevand circumference, and pass two mandrels, B C, through it, as seen in Figs. 3 and 4, when, by means of screws D or other device, the mandrels are spread apart, causing the tube to take the shape shown in Fig. 5, approximately rectangular in cross section, when the mandrels are withdrawn, which leaves the header ready for the second operation, which is as follows: t

A multiple die, E, of a single bar of metal, as shown in cross-section, Fig. 7, is placed within the rectangular header, when two series of male dies, F G, are forced from either side into the female multiple die E, thus cutting the holes H I, the latter of which are preferably smaller than the former.

For convenience the multiple die E maybe formed in two sections, e e', Fig. 8, and held apart and tight in the header by means of wedges or the like. This will enable them to be more readily removed after the operation of punching the holes.

The last operation, which is raising the hand-hole seats, is accomplished by placing the header upon a female multiple die, J, Fig. 9, and placing inside of said header a multiple male die, K, and forcing the latter into the former, thus raising the seats, as seen in Figs.

2, 9, and l0.

The ends of the header are closed by caps M, riveted or otherwise secured thereto, which completes the header as seen in Figs. 1 and 2.

Having thus described lnyinvention, what I claim as nenT and useful isl. The method or process of making a header for a water-tube boiler, the same consisting in first cutting the holes in two opposite sides of a tube and then pressing the metal surrounding the handholes into the desired forln to constitute raised seats for hand-hole plates, substantial] y as set forth.

2. The method or process of forming the raised hand-hole seats for a header of a water' tube boiler, consisting in placing the header with the hand-hole side on a suitably-formed ICO to constitute raised seats for hund-hole plates, In testimony whereof I affix my signature in substantially as set forth. s presence of two witnesses.

3. The method of making a tube approximately rectangular in cross-section, by nsert- Y WILLIAM KENT.

5 ing two mandrels rectangular in cross-section inside of the tube, and forcing them apart by Witnesses: the action of screws passed through the eX- S. S. WILLIAMSON, tremities thereof, substantially as set forth. H. T. SHELTON, Jr. 

